Abstract: The present invention concerns an optical fibre comprising: an optical waveguide comprising a glass core surrounded by a glass cladding; a coating surrounding said optical waveguide comprising a cured polymer material comprising a polyester obtained by polymerization of a monomer selected from an acid, a triglyceride, or a mixture of triglycerides having a C16-C24 aliphatic chain comprising at least two conjugated double bonds. The present invention concerns also a method for coating an optical fibre with said polyester coating. The cured polymer material forming the coating can be prepared by curing the polyester of the invention either thermally or by radiation.

Abstract: An energy cable comprising at least one cable core comprising an electric conductor, a crosslinked electrically insulating system comprising an inner semiconducting layer, an insulating layer and an outer semiconducting layer and zeolite particles placed between the electric conductor and the inner semiconducting layer of the insulating system. The zeolite particles are able to efficiently extract and irreversibly absorb the by-products deriving from the cross-linking reaction, so as to avoid space charge accumulation in the insulating material during cable lifespan. This allows to eliminate the high temperature, long lasting degassing process of the energy cable cores having a crosslinked insulating layer, or at least to reduce temperature and/or duration of the same, so as to increase productivity and reduce manufacturing costs.

Abstract: An energy cable includes, at least one cable core including an electric conductor, a crosslinked electrically insulating layer, and zeolite particles placed in the cable core. The zeolite particles are able to extract and absorb, very efficiently and irreversibly, the by-products deriving from the cross-linking reaction, so as to avoid space charge accumulation in the insulating material during cable lifespan. A method for extracting crosslinking by-products from a cross-linked electrically insulating layer of an energy cable core, which includes manufacturing the energy cable core containing zeolite particles, heating the energy cable core up to a temperature causing migration of the crosslinking by-products from the crosslinked electrically insulating layer; and then placing a metal screen around the energy cable core.

Abstract: A process for producing an energy cable including at least one electrically conductive core and at least one thermoplastic electrically insulating layer, includes the steps of: impregnating a thermoplastic material in subdivided solid form, having a melting enthalpy equal to or lower than 70 J/g, with a dielectric fluid to obtain an impregnated thermoplastic material; feeding the impregnated thermoplastic material in subdivided solid form to a single-screw extruder; and extruding the impregnated thermoplastic material onto the at least one electrically conductive core, so as to form the at least one thermoplastic electrically insulating layer, whereby the impregnated thermoplastic material is not subjected to any mechanical homogenization step in a molten state. Energy cables having a large amount of the dielectric fluid in the electrically insulting layer, e.g.

Abstract: An optical termination module (50) comprises a fixed part (60) to be attached to a mounting member (108) of an electric cabinet (100) and a movable part (70) rotatably attached to the fixed part (60) to move relative to the fixed part (60) about a rotation axis (X-X) between a first position and a second position. The fixed part (60) has a bottom surface (61a) with an inlet opening (61b) configured to receive an optical drop cable (1) and the movable part (70) has a bottom surface (71a) with one or more outlet openings (71b) configured to receive respective one or more optical customer cables (5).

Abstract: Energy cable comprising, from the interior to the exterior, an electrical conductor, an inner semiconductive layer, an electrically insulating layer made from a thermoplastic material in admixture with a dielectric fluid, and an outer semiconductive layer, wherein the outer semiconductive layer comprises: (i) from 55 wt % to 90 wt % of a copolymer of ethylene with at least one ester comonomer having an ethylenic unsaturation; (ii) from 10 wt % to 45 wt % of a propylene copolymer with at least one olefin comonomer selected from ethylene and an ?-olefin other than propylene, said copolymer having a melting point of from 145° C. to 170° C. and a melting enthalpy of from 40 J/g to 80 J/g; (iii) at least one conductive filler; (iv) at least one dielectric fluid; the amounts of (i) and (ii) being expressed with respect to the total weight of the polymeric components of the layer.

Abstract: A power cable having a metallic electrical conductor surrounded by one or more semiconductive layer and more or more insulating layer, wherein the cable has at least one metallic element made of aluminum, having a corrosion inhibitor provided in direct contact with the at least one metallic element made of aluminum.

Abstract: A cable includes a longitudinal structural element including at least one of an electrical conductor and an optical conductor, and a strain sensor arranged within a bending neutral region of the cable and mechanically coupled with the longitudinal structural element. The strain sensor includes an optical fiber coated with at least one coating layer, a release layer surrounding the coating layer, and a protective layer surrounding the release layer. The release layer includes a material selected from a silicone polymer, a fluoropolymer mixture or an extruded polymer containing a slip agent.

Abstract: An optical fiber unit for air-blown installations includes a number of optical conductors, a first layer of resin material, a second layer of resin material radially outer to the first layer of resin material and a sheath of a thermoplastic material, wherein the second layer of resin material has a secant modulus higher than a secant modulus of the first layer of resin material and wherein the sheath of thermoplastic material is over and in close contact with the second layer of resin material.

Abstract: A method of locating incipient faults that generate partial discharges in an AC power distribution system includes detecting at least one spike in a PD pattern generated by such system; getting the voltage wave of the AC power in the system; detecting a phase of such spike with respect to the voltage of the AC power; and locating an incipient fault where such phase is below a predetermined threshold. An apparatus includes at least one sensor of electrical pulses, means for getting a synchronism signal with a power supply of the power distribution system, and modules adapted to carry out the method.

Abstract: A partial discharge acquisition system includes: a synchronization signal sensor device including a sensor module structured to remotely detect a first synchronization electromagnetic signal generated by an alternate current electrical voltage associated with the operation of an electrical object and provide a corresponding first detected electrical signal; a transmitting device structured to irradiate a second synchronization electromagnetic signal related with the first detected electrical signal; a partial discharge detection apparatus including: a receiving device structured to receive the second synchronization electromagnetic signal and generate a corresponding received electrical signal representing at least a timing parameter of the alternate current electrical voltage, the receiving device and the transmitting device being configured to establish a wireless communication link defining a deterministic transmission delay.

Abstract: A multimode optical fiber for continuous transmission of electromagnetic radiation at high power, wherein the fiber defines a fiber axis and includes a core and a cladding surrounding the core, and wherein the multimode optical fiber is a multimode graded-index fiber, the refraction index profile in the fiber essentially following formula (1): n ? ( r ) = { n 1 ? [ 1 - 2 ? ( r a ) g ? ? ] 1 ? / ? 2 , r < a n 2 , r > a ( 1 ) ? = n 1 2 - n 2 2 2 ? n 1 2 ( A ) NA = n 1 2 - n 2 2 ( B ) where ? is formula (A), r is the distance from the fiber axis, n(r) is the nominal refractive index as a function of distance from the fiber axis, n1 is the nominal refractive index on the axis of the fiber, n2 is the refractive index of the cladding, a is the core radius, and g is a parameter that defines the shape of the profile, where the core diameter 2a is between 90 UM and 190 ?M, the parameter g is between 1.

Abstract: A fire-resistive cable system comprises an electrical cable housed in a fiberglass-reinforced thermosetting resin conduit. The electrical cable comprises a conductor and has only one couple of mica tapes surrounding the conductor. The couple of mica tapes are formed of a first mica tape and a second mica tape wound around the first mica tape. The mica layer of the first mica tape faces and contacts the mica layer of the second mica tape. The fiberglass-reinforced thermosetting resin conduit is made of a material comprising fibers of a glass selected from E-glass and E-CR-glass, and a resin.

Abstract: An optical cable including a load bearing core includes a longitudinally and radially extending slot housing at least one optical fibre, wherein the slot has a width providing a low clearance for the optical fibre(s) housed therein and preventing two optical fibres being stuck to one another; and the slot has a depth equal to or lower than a radius of the core.

Abstract: A method for connecting a number of users with at least one signal bearing optical fiber (1101÷z; 2101÷5) contained in an optical cable (105; 205) is proposed.

Abstract: The flexible optical-fiber ribbon can be reversibly adapted to both planar and non-planar shapes (e.g., packed via folding or rolling) without damaging the optical-fiber ribbon or its constituent optical fibers.

Abstract: A multi-phase power cable includes: a plurality of phase cores, each including an insulated electric conductor; a screen assembly including a metallic screen rod; a moisture barrier metallic sheet enclosing the plurality of phase cores and the screen rod; an outer jacket radially outer to the moisture barrier metallic sheet; and a multilayer arrangement including a first, second and third semiconducting water swellable layer surrounding the phase cores and in radial internal position with respect to the moisture barrier metallic sheet and in electric contact therewith, the screen assembly being arranged between the second and third semiconducting water swellable layers.

Abstract: Optical fiber connector assembly for a fiber optic cable includes an optical fiber having an end portion terminated with a ferrule and rod members. The optical fiber connector assembly includes: a ferrule holder configured to hold the end portion of the optical fiber, the ferrule and the rod members; a connector having an internal passageway for housing the ferrule holder; a locking member extending lengthwise and having an internal passageway for the end portion of the fiber optic cable. A pre-connectorized fiber optic cable includes a fiber optic cable and the optical fiber connector assembly mounted upon an end portion of the fiber optic cable.

Abstract: An optical cable includes an optical core and an external sheath surrounding the optical core. The external sheath includes a first material having a first, higher fracture toughness and a second material having a second, lower fracture toughness. The first and second materials are arranged so that the second, lower fracture toughness material is accessible from outside the cable along at least one longitudinally extending area of the sheath outer surface. For accessing the optical core of the cable, a short longitudinal cut, namely, few centimeters, is made with a blade in the accessible second, lower fracture toughness material. Then, its cut edges are pulled apart by hand. The pulling force causes the lower fracture toughness material to fracture, thereby propagating the initial short cut longitudinally along the sheath through its whole thickness.

Abstract: A method for detecting an electrical current longitudinal variation in a power transmission system including a power cable. Electric losses and their location along the cable length can be detected. Current variation in a grounded metallic layer of a power cable is measured from Faraday rotation of polarised light travelling in a single-mode optical fiber wound in a radially external position with respect to the grounded metallic layer. Measurements of the Faraday rotation are carried out by means of polarization-sensitive optical time domain reflectometry (POTDR) or by polarization-sensitive optical frequency domain reflectometry (POFDR) while a direct current is injected in the metallic layer.